Node-RED

Here you will find guides that deal with the graphical IoT development and data processing tool Node-RED.

  less than a minute  

Here we aggregate guides on how to work with Node-RED when using the United Manufacturing Hub.

Node-RED is an open-Source web application, which can take data from many sources, such as MQTT or kafka brokers and allows the used to set up data processing flows.

We have some information on Node-RED in our Knowledge section.

For more detailed information as an introduction into Node-RED, we suggest watching the following video

Using Node-RED with Kafka messages

How to utilize Kafka messages in Node-RED, including receiving and commiting them

Fetching data from factoryinsight

The purpose of this tutorial is to extract data by using factoryinsight and calculate the machine indicator OEE (Overall Equipment Efficiency). This can allow the creation of different tools, such as a production dashboard.

How to eliminate 'Cannot GET /' error in Node-RED?

This troubleshooting guide describes the solution when opening Node-RED, the following error message appears: Cannot GET /

Importing and exporting in/from Node-RED

Sometimes you may want to use a template in Node-RED or you want to copy a flow from one machine to another.

How to fix broken Node-RED flows?

This troubleshooting guide describes how you can recover Node-RED flows that are stuck in an endless loop of crashing.

Changing the language

Here you learn to change the language of Node-Red.

How to fix not properly configured nodes in Node-RED?

This troubleshooting guide describes how to fix not properly configured nodes in Node-RED.

Getting missing Plugins

You want to add unknown nodes in Node-RED? Are there nodes with a red outlining? And you can’t deploy? Here’s what to do

Installing new nodes / plugins?

When using S7 and OPC-UA nodes the installation of new nodes can fail (endless loop). This is an tutorial on how to install them nevertheless (be careful, this removes all existing plugins)

What to do when MQTT in & out fails to connect? (don’t forget ia_nodered!)

While building the Node-RED flow the MQTT elements failed to connect under deployment.

What to do when the connection to MQTT server fails after importing flows?

This troubleshooting guide describes how to connect mqtt-in node from an old Node-RED flow

Recovering Node-RED flows

Recovering accidently changed or deleted Node-RED flows.

What to do when PLC’s are returning negative values (garbage values)?

This troubleshooting guide describes how to solve the problem when a PLC data tags return negative values

Last modified February 17, 2023: update (#208) (ea731fc)